ATI RN
130 Top Epidemiology Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
What is the main purpose of a control group in a case-control study?
Correct Answer: A
Rationale: Controls (A) in case-control studies compare exposure in non-diseased to diseased. B is trials, C and D are cohort/cross-sectional aims.
Question 2 of 5
What type of bias occurs when the measurement of exposure or outcome is influenced by the knowledge of the hypothesis?
Correct Answer: D
Rationale: Observer bias (D) occurs when hypothesis knowledge skews measurement (e.g., biased scoring). A is selection, B is broad, C is recall-specific.
Question 3 of 5
In a cohort study, what is the main outcome measure?
Correct Answer: A
Rationale: Cohort studies measure incidence rate (A) of new cases over time. B is cross-sectional, C is case-control, D is related but not primary.
Question 4 of 5
What is the primary way to reduce selection bias in a study?
Correct Answer: A
Rationale: Randomization (A) reduces selection bias by evenly distributing characteristics (e.g., in RCTs). B, C, and D address other biases.
Question 5 of 5
Which of the following is a strategy to control for confounding in the design phase of a study?
Correct Answer: C
Rationale: Matching (C) controls confounding in design (e.g., age-matching). A and B are analysis, D is bias reduction.